Patents by Inventor Byung-Han Ryu

Byung-Han Ryu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20120244878
    Abstract: The present invention provides a method including two operations of a first operation and a second operation. The first operation may determine between a terminal located in a space including the small base station and a terminal located in a space excluding the small base station based on a value reported by a terminal. The second operation may be performed using information received from a neighboring macro base station in response to the determination failing to be performed in the first operation, thereby ultimately discriminating between an area including the small base station and an area excluding the small base station corresponding to a location of a terminal.
    Type: Application
    Filed: March 23, 2012
    Publication date: September 27, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kyong Tak CHO, Jun Sik KIM, Byung Han RYU, Nam Hoon PARK
  • Patent number: 8155104
    Abstract: Disclosed is a method for a preamble-based bandwidth request. The present invention enables state control of a subscriber station based on the latest environment in a portable Internet system requesting a bandwidth using a preamble, and hence allows a subsequent more efficient transmission of user data. In addition, the present invention provides information for discrimination of the subscriber station transmitting the preamble as well as state control information of the subscriber station to the base station during a preamble-based bandwidth request by the subscriber station, and enables the base station to discriminate the subscriber station in the next time of data transmission with the subscriber station.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: April 10, 2012
    Assignees: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd., KT Corporation, KTFreetel Co., Ltd., Hanaro Telecom., Inc., SK Telecom Co., Ltd.
    Inventors: Chul-Sik Yoon, Chang-Wahn Yu, Kun-Min Yeo, Byung-Han Ryu
  • Patent number: 8145121
    Abstract: The embodiments relate to a wireless communication system that counts UEs using an MBMS. The wireless communication system is connected with a UE through a radio link, and includes a Node B and a controlling radio network controller (CRNC). The Node B receives sequence setting information on a sequence included in a preamble transmitted from the UE network manager. The CRNC controls the Node B, detects a sequence according to whether to use an MBMS based on the sequence setting information, and performs a counting process for counting UEs based on whether the UE uses the MBMS. According to the embodiments, counting of UEs using an MBMS can be performed by using a predetermined sequence. Particularly, the counting process can be simplified by reducing complexity in access probability management of a network manager, thereby increasing efficiency in data transmission by reducing signaling for random access probability and omitting a random access probability calculation process.
    Type: Grant
    Filed: December 6, 2006
    Date of Patent: March 27, 2012
    Assignees: Electronics and Telecommunications Research Institute, SK Telecom Co., Ltd., KT Corporation
    Inventors: Jung-Im Kim, Byung-Han Ryu, Seung-Chan Bang
  • Patent number: 8098622
    Abstract: The present invention relates to a resource allocation requesting method and a packet scheduling method for uplink packet traffic in a mobile communication system, and an apparatus of the packet scheduling method. For efficient scheduling for the uplink traffic, scheduling is performed according to characteristics of traffic between a base station and user equipment (UE). Particularly, when the traffic generates a variable size packet on a periodic basis, the traffic is classified into first traffic that generates a completely variable size packet on a periodic basis and second traffic that generates a quasi-variable size packet on a periodic basis. In addition, the UE requests resource allocation in a different form from the base station depending on the type of traffic, and the base station performs scheduling according to the resource allocation request.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: January 17, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Geon-Min Yeo, Byung-Han Ryu
  • Publication number: 20110310782
    Abstract: Provided is a method and apparatus for discontinuously transmitting/receiving packets for low-power consumption of a terminal in a cellular system for packet transmission. The present research provides a method and apparatus that can perform a low-power consuming operation when a terminal is in active state in a cellular system. The method for discontinuously transmitting/receiving packet data to reduce power consumption of a terminal in a cellular system, including a) establishing discontinuous reception/transmission (DRX/DTX) parameters including discontinuous DRX/DTX cycle information for terminals operating in a transmission suspension mode, which is a sub-state of an active state; and b) performing DRX/DTX based on the DRX/DTX parameters in the terminals operating in the transmission suspension mode.
    Type: Application
    Filed: September 2, 2011
    Publication date: December 22, 2011
    Applicants: Electronics and Telecommunications Research Institute, SK Telecom Co., Ltd.
    Inventors: Jae-Heung KIM, Byung-Han Ryu, Seung-Chan Bang
  • Publication number: 20110305218
    Abstract: A method for requesting and reporting channel quality information (CQI) in a wireless portable Internet system is disclosed. Timing of a channel quality information request by a base station is determined, existence of an automatic repeat request acknowledgment (ARQ_ACK) message of downlink data is determined on requesting the channel quality information from the subscriber station, the automatic repeat request acknowledgment message and the radio resource for the channel quality report to the subscriber station is allocated, the automatic repeat request acknowledgment message and the channel quality report information is received, and a modulating and coding level of downlink data is determined by extracting the channel quality report information form the automatic repeat request acknowledgment message.
    Type: Application
    Filed: August 18, 2011
    Publication date: December 15, 2011
    Applicants: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd., Hanaro Telecom., Inc., SK Telecom Co., Ltd., KTFreetel Co., Ltd., KT Corporation
    Inventors: Chul-Sik YOON, Jae-Heung Kim, Kun-Min Yeo, Soon-Yong Lim, Byung-Han Ryu
  • Publication number: 20110286500
    Abstract: A synchronization method of a radio repeater includes: using a first signal, a second signal, and a received signal including the first signal and the second signal to calculate correlation values of the first signal and the second signal; using the first signal correlation value, the second signal correlation value, and the power value of the received signal to output normalized correlation values; subtracting the normalized correlation value of the first signal and the normalized correlation value of the second signal; and detecting a start interval of the second signal based on the subtraction result and outputting a synchronization signal to synchronize the radio repeater.
    Type: Application
    Filed: May 23, 2011
    Publication date: November 24, 2011
    Applicant: ELECTRONICS AND TELECOMMUNICATION RESEARCH INSTITUTE
    Inventors: Jun-Woo KIM, Young Jo Bang, Byung-Han Ryu, Hyeong Jun Park, Youn Ok Park, Jee Hwan Ahn
  • Patent number: 8059531
    Abstract: Provided is a method of scheduling packets in a mobile telecommunication. The method includes the steps of: a) calculating a normalized standard data unit (SDU) drop rate based on the number of SDUs that will be dropped if the SDUs will not transmitted in a next slot, the number of SDUs dropped unit a current slot, the number of SDUs transmitted until the current slot and a maximum SDU drop rate allowed at each session; b) selecting sessions to transmit in a next slot and deciding a transmission amount of each session at a current slot based on the normalized SDU drop rate; and c) performing the steps a) and b) until all basic units (BU) in one slot are used.
    Type: Grant
    Filed: October 12, 2005
    Date of Patent: November 15, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kun-Min Yeo, Byung-Han Ryu
  • Patent number: 8050208
    Abstract: An extended paging indicator-based adaptive discontinuous reception method is proposed so as to improve a power saving performance of a terminal in an asynchronous wideband code division multiple access schemes. To this end, a plurality of terminals for performing power saving receive an extended paging indicator for a discontinuous reception cycle, conform a type of a bit Run for configuring the extended paging indicator, and change the discontinuous reception period. In addition, the terminals set the discontinuous reception period update factor value to be varied according to the extended paging indicator as an initial value so as to determine a next paging occasion block, change the discontinuous reception period update factor value according to the paging indicator of the bit Run received from base station, and change the discontinuous reception period according to the variance of the discontinuous reception period update factor value.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: November 1, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Soo-Jung Jung, Byung-Han Ryu, Yoan Shin, Myung-Sik Yoo, Suck-Chel Yang
  • Patent number: 8018911
    Abstract: A method for requesting and reporting channel quality information (CQI) in a wireless portable Internet system is disclosed. Timing of a channel quality information request by a base station is determined, existence of an automatic repeat request acknowledgment (ARQ_ACK) message of downlink data is determined on requesting the channel quality information from the subscriber station, the automatic repeat request acknowledgment message and the radio resource for the channel quality report to the subscriber station is allocated, the automatic repeat request acknowledgment message and the channel quality report information is received, and a modulating and coding level of downlink data is determined by extracting the channel quality report information from the automatic repeat request acknowledgment message.
    Type: Grant
    Filed: February 2, 2005
    Date of Patent: September 13, 2011
    Assignees: Electronics and Telecommunications Research Insitiute, Samsung Electronics Co., Ltd, KT Corporation, SK Telecom Co., Ltd, KT Freetel Co., Ltd, Hanaro Telecom, Inc.
    Inventors: Chul-Sik Yoon, Jae-Heung Kim, Kun-Min Yeo, Soon-Yong Lim, Byung-Han Ryu
  • Publication number: 20110195697
    Abstract: In a cellar system providing various packet services, sleep mode operation of a terminal in an idle state is controlled. The cellular system determines a discontinuous receiving (DRX) period according to a QoS of a packet service provided to the terminal, and runs the sleep mode according to the determined DRX period. The cellular system runs the sleep mode divided into shallow sleep duration and deep sleep duration. With this manner, a paging delay to the terminal and a power consumption of the terminal may be reduced.
    Type: Application
    Filed: February 15, 2011
    Publication date: August 11, 2011
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jae-Heung KIM, Byung-Han RYU, Seung-Chan BANG
  • Publication number: 20110183689
    Abstract: Provided is a wireless position determining method and apparatus. The wireless position determining includes: a measuring unit that measures a propagation delay tap of a signal received from a transmitting end through a channel; and extractor that extracts delay spread information having various forms based on the propagation delay tap; and an obtaining and calculating unit that obtains a distance between transmission and reception ends based on the delay spread information and calculates a position of a receiving end based on the obtained distance between the transmission and reception ends.
    Type: Application
    Filed: October 1, 2009
    Publication date: July 28, 2011
    Inventors: Kanghee Kim, Geon Min Yeo, Byung-Han Ryu, Jee Hwan Ahn, Jae Kyun Kwon, Youngsuk Suh, Kyungsu Yun, Kang-Il Ahn
  • Patent number: 7986699
    Abstract: The present invention provides a method for downlink packet scheduling for scheduling a real-time service and a non-real-time service. The method for downlink packet scheduling includes steps of: a) classifying inputted packets based on a type of packet and storing a maximum delay time information of the packets; b) determining a user urgency of the packets by using the maximum delay time information and a channel state by using an instantaneous channel state, an average channel state, or a ratio of the instantaneous channel state and the average channel state; c) determining a priority based on the user urgency and the channel state; and d) transmitting the packets according to the priority.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: July 26, 2011
    Assignee: Electronics and Telecommunications Research Instittue
    Inventors: Seung-Wan Ryu, Byung-Han Ryu, Hyun-Hwa Seo, Chul-Sik Yoon
  • Publication number: 20110074635
    Abstract: Provides are method and apparatus for wireless positioning. An exemplary embodiment of the present invention provides a method for wireless positioning, which includes: receiving signals from a plurality of transmitters; determining propagation delay tabs of the plurality of transmitters, from the signals received from the plurality of transmitters, respectively; setting the order of the plurality of transmitters in accordance with the propagation delay tabs; measuring distances between a receiver and the transmitter, respectively; and estimating the position of the receiver, by using the order and the measured distance.
    Type: Application
    Filed: September 30, 2010
    Publication date: March 31, 2011
    Applicant: Electronics and Telecommunications Research Institute.
    Inventors: Geon Min YEO, Byung-Han RYU, Hyeong Jun PARK, Sook Jin LEE
  • Publication number: 20110074634
    Abstract: A wireless positioning method of a receiver is provided. Signals are received from a plurality of transmitters, propagation taps of the plurality of transmitters received from the plurality of transmitters are determined, respectively, the distance between the receiver and each of the transmitters is calculated, respectively, the distances are corrected by using propagation delay taps of the respective transmitters to determine final distances between the receiver and each of the transmitters, and an area, in which circles away by the final distances between the receiver and each of the transmitters on the basis of the center of each of the transmitters overlap with each other, is estimated as the location of the receiver. Thus, an error of wireless positioning according to a propagation environment can be reduced.
    Type: Application
    Filed: September 30, 2010
    Publication date: March 31, 2011
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Geon Min Yeo, Byung-Han Ryu, Hyeong Jun Park, Jisoo Park, Sook Jin Lee
  • Publication number: 20110074632
    Abstract: A wireless positioning method of a receiver is provided. Signals are received from a plurality of transmitters, propagation taps of the plurality of transmitters received from the plurality of transmitters are determined, respectively, the distance between the receiver and each of the transmitters is calculated, respectively, the weight of each of the transmitters is calculated by using each of the propagation delay tap, the distance is adjusted by using the weight of each of the transmitters, and an area, in which circles away by the adjusted distances between the receiver and each of the transmitters on the basis of each of the transmitters overlap with each other, is estimated as the location of the receiver. Thus, an error of wireless positioning according to a propagation environment can be reduced.
    Type: Application
    Filed: September 30, 2010
    Publication date: March 31, 2011
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Geon Min Yeo, Kanghee Kim, Byung-Han Ryu, Hyeong Jun Park
  • Patent number: 7912467
    Abstract: Disclosed is a method and device for controlling a power saving mode for applying the sleep mode for saving power consumption to the mobility of subscriber stations in a mobile communication network and a wireless Internet system. Subscriber stations entering the sleep mode are constantly grouped, listening intervals of the subscriber stations for each group are not superimposed, the existence state of traffic in the subscriber stations is independently notified for each group, and the overhead of signaling messages is minimized when the traffic is notified to the subscriber station in the sleep mode.
    Type: Grant
    Filed: December 24, 2004
    Date of Patent: March 22, 2011
    Assignees: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd., KT Corporation, SK Telecom Co., Ltd., KTFreetel Co., Ltd., Hanaro Telecom, Inc.
    Inventors: Chul-Sik Yoon, Jae-Heung Kim, Kun-Min Yeo, Soon-Yong Lim, Byung-Han Ryu
  • Publication number: 20110044223
    Abstract: Provided is a method for transmitting and receiving multimedia broadcast multicast service (MBMS) data in a packet based cellular system.
    Type: Application
    Filed: August 23, 2007
    Publication date: February 24, 2011
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jung-Im Kim, Young-Jo Ko, Jae-Heung Kim, Kyoung-Seok Lee, Byung-Han Ryu, Seung-Chan Bang
  • Patent number: 7881298
    Abstract: Provided is a method of segmenting a packet using a tree structure in order to reduce headers in the packet when the packet is transmitted or received in a wireless communication system using an adaptive modulation and coding (AMC), and a method of transmitting/receiving a packet using the same. The method includes the steps of: determining whether a transmitting processing data unit (PDU) is a retransmitted PDU; determining whether a size of the retransmitted PDU is a transmittable size allowed by a corresponding adaptive modulation and coding (AMC) option if the transmitting PDU is the retransmitted PDU; and segmenting the retransmitting PDU, inserting a header and a sub header with identification information for reassembling into each of the segmented PDUs and transmitting the segmented PDUs.
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: February 1, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Il-Soon Jang, Byung-Han Ryu
  • Publication number: 20100325509
    Abstract: Provided is a Multimedia Broadcast Multicast Service (MBMS); and, more particularly, a data transmission/receiving method in a multimedia broadcast multicast service system, and an apparatus thereof. The data transmitting method in the MBMS system includes the step of checking a terminal receiving data provided from the MBMS and the step of determining whether there is error report feedback on retransmission of the data according to the number of the detected terminals.
    Type: Application
    Filed: June 20, 2008
    Publication date: December 23, 2010
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jung-Im Kim, Kyoung-Seok Lee, Jae-Heung Kim, Byung-Han Ryu, Seung-Chan Bang